The Realistic Model 31-1989 Seven Band Stereo Frequency Equalizer is a vintage audio device manufactured in 1989. This silver and black unit is a stereo equalizer that operates on 120V with a frequency of 60 Hz. It features two RCA audio outputs and inputs, making it compatible with a variety of audio equipment. With its analog features and 10-watt power output, this Realistic equalizer provides a realistic and high-quality audio experience for older home audio systems.